Bicycle.



PATENTED DBO. a, 1904.

N. J. GREENISON.

BICYCLE.

APPLIOATION FILED MAY 3. 1904.

N0 MODEL.

INVENTORA M ATTORNEY.

WITNESSES.-

Patented December 6, 1904.

PAT @FFliQF...

NELSON J. GREENISON, OF NEWV YORK, N. Y.

BICYCLE.

SPECIFICATION forming part of Letters Patent N0. 776,661, dated December 6, 1904.

' Application filed May 3, 1904:. Serial No. 206,114. (No model.)

To all whzmt it may concern.-

Be it known thatI, N .ELSON J. GREnNIsoN. of the city, county. and State of New York, have invented a new and Improved Bicycle,of which the following is a full, clear, and exact description.

This invention relates to a bicycle, and refers particularly to the method of propulsion and is designed to give a free smooth running mechanism that converts reciprocating into rotary motion.

A further object is to provide a means of propulsion that is adjustable, to provide different speeds, and also one in which the motion of the pedals is perpendicular on one side of the fulcrum of the pedal-lever.

The invention is described in the accompanying drawings, in which Figure 1 is a side View of a bicycle provided with the new propelling device. Fig. 2 is a rear view of the operating mechanism, and Fig. 3 is asection through one of the parts of the device that Will be described hereinafter.

Fig. 4i is a section of part of the driving mech-' anisrn, showing a modification of the adjusting means.

In the drawings I show a conventional bicycle-frame 10, and pivoted on either side of the frame outside thereof are a pair of pedallevers 11, that are pivoted at 12 and are provided with the usual pedals 13 on their forward ends and on the opposed ends have the slotted members 14:. A gear-wheel 15 is arranged on the frame and a pin 16, that is secured thereto, is adapted to be actuated by the slotted member 1 and thus cause a rotation of the gear 15. The gear 15 is in mesh. with the gear 17, that is connected to the axle of the rear wheel 18. It will thus be seen that a perpendicular reciprocating motion of the pedals 13 will cause a steady rotary motion of the rear wheel and the ratio of the gears 15 and 17 would of course establish the gear and regulate the speed.

in Fig. 3 1 show a section of the gear 15 and the slotted member 14. showing the adjustable feature whereby the screw-threaded portion 19, that can be made integral with or rotatably secured in the pin 16, is adapted to be placed in the different perforations 22 in the gear 15. This adjustment will make a difference in amount of power necessary to drive the wheel. These perforations 22 can be radially arranged or any other suitable arrangement can be used.

The slotted member 14 can have the retainer 20 secured to its outside face, thereby confining the balls 21, that would rotate in the ball-race 16 in the pin 16. This construction would provide a bearing with very little friction and one that would also provide an easy change of gear.

In Fig. 4 is illustrated a slight modification of the adjustable mechanism of the pin 16. and in this case a slot 23 can be used instead of the perforations 22 and the bolt of the pin 16 would project through and slide therein and the nuts 2 L could be used to lock the pin 16 in any position in the slot 23 that was desired.

It will thus be seen that l have constructed a bicycle propelling mechanism in which the adjustable features are simple and in which the propulsion of the wheel would be easy.

It will be understood that the driving-gear comprising my invention can be used for driving mechanism other than bicycle-wheels and that any suitable transmission-gearing can be substituted for the gear-wheels 15 without affecting the principle of the invention. It will also be seen that any suitable means can be used for actuating the levers 11.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1 1. A driving-gear for bicycles, comprising a supporting-frame, a pair of pedal-levers pivoted on the frame between their driving and driven ends the said levers having each one straight slotted end, a driving-axle having gears thereon, and a second set of gears meshing with the axle-gears and provided with pins which enter the slots of the lovers the lovers and pins being arranged in relation to each other so that the pins have a constant bearing on the levers during the entire rotation of the gears.

2. A driving-gear, comprising a pair of oseillating fulcrurnedlevershaving straightslots l entire rotation of the Wheels, the fulcrum of at one end and ball-bearings running 111 a racel the lever being arranged between theirdmv- Way in the Walls of the slots, and rotatable ing and driven ends.

Wheels suitably journaled said Wheels having NELSON J. GREENISON. 5 pins sliding in the slots of the levers the l/Vitnesses:

Wheels and levers being arranged so that the M. H. OAMFIELD,

pins bear on the Walls of the slots during the THERON DAVIS. 

